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60 pin CNR bus connector layout
60 pin CNR bus connector
at the computer motherboard
The CNR connector is the interface between the motherboard and the CNR board. The connector provides all of the necessary signals to support several different configurations of audio, modem, and/or LAN subsystems in the system

Type A CNR connector, while the pin-out for the seventeen-pin LAN interface is defined in the Type B CNR connector.

 


 

Type A CNR connector

Pin Signal Type Description
A1 RESERVED - RESERVED
B1 RESERVED - RESERVED
A2 RESERVED - RESERVED
B2 RESERVED - RESERVED
A3 GND - Power supply and signal ground return path.
B3 RESERVED - RESERVED
A4 RESERVED - RESERVED
B4 GND - Power supply and signal ground return path.
A5 RESERVED - RESERVED
B5 RESERVED - RESERVED
A6 GND - Power supply and signal ground return path.
B6 RESERVED - RESERVED
A7 LAN_TXD2 IN Bit 2 (MSB) of the 3-bit data bus transferring data from the MAC to the LAN Interface compliant PLC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B7 GND - Power supply and signal ground return path.
A8 LAN_TXD0 IN Bit 0 (LSB) of the 3-bit data bus transferring data from the MAC to the LAN Interface compliant PLC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B8 LAN_TXD1 IN Bit 1 of the 3-bit data bus transferring data from the MAC to the LAN Interface compliant PLC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A9 GND - Power supply and signal ground return path.
B9 LAN_RSTSYNC OUT This is a dual function pin that provides either a reset pulse or a synchronization pulse from the MAC to the LAN Interface compliant PLC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A10 LAN_CLK OUT Data clock from a LAN Interface compliant PLC to the Media Access Controller (MAC). The nominal frequency of this signal determines the data transfer rate between the PLC and the MAC. For detailed information, refer to the current version Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B10 GND - Power supply and signal ground return path.
A11 LAN_RXD1 OUT Bit 1 of the 3-bit data bus transferring data from the LAN Interface compliant PLC device to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B11 LAN_RXD2 OUT Bit 2 (MSB) of the 3-bit data bus transferring data from the LAN Interface compliant PLC to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A12 RESERVED - RESERVED
B12 LAN_RXD0 OUT Bit 0 (LSB) of the 3-bit data bus transferring data from the LAN Interface compliant PLC device to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A13 USB+ IN/OUT Positive side of the differential USB 1.x or 2.0 data signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
B13 GND - Power supply and signal ground return path.
A14 GND - Power supply and signal ground return path.
B14 RESERVED - RESERVED
A15 USB- IN/OUT Negative side of the differential USB 1.x or 2.0 data signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
B15 +5Vdual Supply Positive 5-volt main/standby power supply (can be used for USB power). +5Vdual supply provides full-rated power capacity during working or full-on state, and a limited power capacity during sleep or suspended states. When a +5Vdual supply is not available, this pin must be connected to a +5 volt standby power source. This signal must not be connected to a +5VD, as doing so eliminates the possibility of deep-sleep wake capabilities.
A16 +12V Supply Positive 12-volt main power supply
B16 USB_OC# OUT USB bus over-current signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
A17 GND - Power supply and signal ground return path.
B17 GND - Power supply and signal ground return path.
A18 +3.3Vdual Supply Positive 3.3-volt main/standby power supply. +3.3Vdual supply provides full-rated power capacity during working or full-on state, and a limited power capacity during sleep or suspended states. When +3.3Vdual is not available, this pin must be connected to a +3.3-volt standby power source. This signal must not be connected to a +3.3VD, as doing so eliminates the possibility of deep-sleep wake capabilities.
B18 -12V Supply Negative 12-volt main power supply
A19 +5VD Supply Positive 5-volt main digital power supply
B19 +3.3VD Supply Positive 3.3-volt main digital power supply
A20 GND - Power supply and signal ground return path.
B20 GND - Power supply and signal ground return path.
A21 EE_DIN IN This signal carries serial data from the core logic MAC Microwire* interface to the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board. The EE_DIN signal on the CNR connector must be connected to the DIN pin on the Microwire EEPROM.
B21 EE_DOUT OUT This signal carries serial data from the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board to the core logic MAC Microwire* interface. The EE_DOUT signal on the CNR connector must be connected to the DOUT pin on the Microwire EEPROM.
A22 EE_CS IN The CNR board uses this signal to enable the serial EEPROM devices on the CNR board. When EE_CS is high (one) the Microwire EEPROM (for the LAN Interface) becomes active. When EE_CS is low (zero) the EEPROM is inactive. The resting state of this signal is low (zero). The state of this signal during reset must be low (zero).
B22 EE_SHCLK IN This signal is the serial clock signal from the core logic MAC Microwire* interface to the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board.
A23 SMB_A1 IN This signal is bit 1 of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address for the CNR board.
B23 GND - Power supply and signal ground return path.
A24 SMB_A2 IN This signal is bit 2 (MSB) of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address for the CNR board.
B24 SMB_A0 IN This signal is bit 0 (LSB) of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address of the CNR board.
A25 SMB_SDA IN/OUT Bi-directional serial data line between the SMBus master to SMBus slave device(s) on the CNR board. For detailed information on this signal, refer to the current version of the System Management Bus Specification. The reset state of this signal must meet the current version of the System Management Bus Specification.
B25 SMB_SCL IN Serial clock line from the SMBus master to SMBus slave device(s) on the CNR board. For detailed information on this signal, refer to the current version of the System Management Bus Specification. The reset state of this signal must meet the current version of the System Management Bus Specification.
A26 AC97_RESET# IN Active low AC TM97 link reset signal. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B26 CDC_DN_ENAB# IN/OUT CDC_DN_ENAB# indicates whether the motherboard or the CNR is in control, or mastering, the AC TM97 interface attached to the CNR Connector. When at a logic low level, the CDC_DN_ENAB# signal indicates that the primary codec on the motherboard is active and controlling the AC TM97 Interface. In addition, the CNR will, when CDC_DN_ENAB# is low, demote its codecs to the next available address and to the next available SDATA_IN signal. See Section 3.3.1 for more details on the implementation of the CDC_DN_ENAB# signal. When at a logic high level, the CDC_DN_ENAB# signal indicates that a primary codec on the CNR is taking control of the AC TM97 Interface. In addition, the motherboard will, when CDC_DN_ENAB# is high, disable all of its codecs. See Section 3.3.1 for more details of how to implement the CDC_DN_ENAB# signal.
A27 RESERVED - RESERVED
B27 GND - Power supply and signal ground return path.
A28 AC97_SDATA_IN1 OUT AC TM97 serial data from an AC TM97-compliant codec (primary or secondary) to an AC TM97-compliant Controller. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B28 AC97_SYNC IN Synchronization pulse from an AC TM97-compliant controller to all of the AC TM97- compliant codecs on the AC link. This signal is nominally a 1.3 µS wide pulse, which is used to synchronize the AC link. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
A29 AC97_SDATA_IN0 OUT AC TM97 serial data from a primary AC TM97-compliant codec to an AC TM97-compliant Controller. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B29 AC97_SDATA_OUT IN AC TM97 serial data from an AC TM97-compliant controller to all of the AC TM97- compliant codecs on the link. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
A30 GND - Power supply and signal ground return path.
B30 AC97_BITCLK IN/OUT Serial data clock from primary codec to AC TM97 Controller and any non-primary codecs. The nominal frequency of this signal is 12.288 MHz. For detailed information, refer to the current version of the AC TM97 Component Specification. AC97_BITCLK is an output from a primary codec and an input to non-primary codecs. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.


 

Type B CNR connector

Pin Signal Type Description
A1 MII_MDC IN Management data clock signal from Management Data Controller to the MII compliant PHY. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B1 MII_MDIO IN/OUT Management data input/output signal between the Management Data Controller and the MII compliant PHY. This signal is used to carry bi-directional data for control and status registers. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A2 MII_CRS OUT Carrier sense signal from the MII compliant PHY to the MAC. This signal indicates that there is traffic on the LAN wire. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B2 MII_COL OUT Collision detect signal from the MII compliant PHY to the MAC. This signal indicates that a collision has occurred on the LAN wire. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A3 GND - Power supply and signal ground return path.
B3 MII_TXC OUT Data clock from the MAC to the MII compliant PHY. For detailed information, refer to the current version Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A4 MII_RXDV OUT Receive data valid signal from the MII compliant PHY to the MAC. This signal indicates that valid data is available on the MII_RXD[3:0] signals. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B4 GND - Power supply and signal ground return path.
A5 MII_RXC OUT Data clock from a MII Interface compliant PHY to the MAC. For detailed information, refer to the current version Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B5 MII_RXERR OUT Receive error signal from the MII compliant PHY to the MAC. This signal indicates that an error has occurred during frame reception. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A6 GND - Power supply and signal ground return path.
B6 MII_TXD3 IN Bit 3 (MSB) of the 4-bit data bus transferring data from the MAC to the MII compliant PHY. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A7 MII_TXD2 IN Bit 2 of the 4-bit data bus transferring data from the MAC to the MII compliant PHY. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B7 GND - Power supply and signal ground return path.
A8 MII_TXD0 IN Bit 0 (LSB) of the 4-bit data bus transferring data from the MAC to the MII compliant PHY. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B8 MII_TXD1 IN Bit 1 of the 4-bit data bus transferring data from the MAC to the MII compliant PHY. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A9 GND - Power supply and signal ground return path.
B9 MII_TXEN IN Transmit enable signal from the MAC to the MII compliant PHY. This signal indicates that the available on the MII_TXD[3:0] signals can be placed on the LAN wire. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A10 RESERVED - RESERVED
B10 GND - Power supply and signal ground return path.
A11 MII_RXD1 OUT Bit 1 of the 4-bit data bus transferring data from the MII compliant PHY to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B11 MII_RXD2 OUT Bit 2 of the 4-bit data bus transferring data from the MII compliant PHY to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A12 MII_RXD3 OUT Bit 3 (MSB) of the 4-bit data bus transferring data from the MII compliant PHY to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
B12 MII_RXD0 OUT Bit 0 (LSB) of the 4-bit data bus transferring data from the MII compliant PHY to the MAC. For detailed information on this signal, refer to the current version of the Core Logic Design Specification and the IEEE 802.3u Specification. The reset state of this signal must meet the requirements set forth in the current version of the Core Logic Design Specification.
A13 USB+ IN/OUT Positive side of the differential USB 1.x or 2.0 data signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
B13 GND - Power supply and signal ground return path.
A14 GND - Power supply and signal ground return path.
B14 RESERVED - RESERVED
A15 USB- IN/OUT Negative side of the differential USB 1.x or 2.0 data signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
B15 +5Vdual Supply Positive 5-volt main/standby power supply (can be used for USB power). +5Vdual supply provides full-rated power capacity during working or full-on state, and a limited power capacity during sleep or suspended states. When a +5Vdual supply is not available, this pin must be connected to a +5 volt standby power source. This signal must not be connected to a +5VD, as doing so eliminates the possibility of deep-sleep wake capabilities.
A16 +12V Supply Positive 12-volt main power supply
B16 USB_OC# OUT USB bus over-current signal. For more information, refer to the Universal Serial Bus Specification. The state of this signal during reset must meet the Universal Serial Bus Specification.
A17 GND - Power supply and signal ground return path.
B17 GND - Power supply and signal ground return path.
A18 +3.3Vdual Supply Positive 3.3-volt main/standby power supply. +3.3Vdual supply provides full-rated power capacity during working or full-on state, and a limited power capacity during sleep or suspended states. When +3.3Vdual is not available, this pin must be connected to a +3.3-volt standby power source. This signal must not be connected to a +3.3VD, as doing so eliminates the possibility of deep-sleep wake capabilities.
B18 -12V Supply Negative 12-volt main power supply
A19 +5VD Supply Positive 5-volt main digital power supply
B19 +3.3VD Supply Positive 3.3-volt main digital power supply
A20 GND - Power supply and signal ground return path.
B20 GND - Power supply and signal ground return path.
A21 EE_DIN IN This signal carries serial data from the core logic MAC Microwire* interface to the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board. The EE_DIN signal on the CNR connector must be connected to the DIN pin on the Microwire EEPROM.
B21 EE_DOUT OUT This signal carries serial data from the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board to the core logic MAC Microwire* interface. The EE_DOUT signal on the CNR connector must be connected to the DOUT pin on the Microwire EEPROM.
A22 EE_CS IN The CNR board uses this signal to enable the serial EEPROM devices on the CNR board. When EE_CS is high (one) the Microwire EEPROM (for the LAN Interface) becomes active. When EE_CS is low (zero) the EEPROM is inactive. The resting state of this signal is low (zero). The state of this signal during reset must be low (zero).
B22 EE_SHCLK IN This signal is the serial clock signal from the core logic MAC Microwire* interface to the Microwire EEPROM (which stores MAC/PLC/PHY specific information) on the CNR board.
A23 SMB_A1 IN This signal is bit 1 of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address for the CNR board.
B23 GND - Power supply and signal ground return path.
A24 SMB_A2 IN This signal is bit 2 (MSB) of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address for the CNR board.
B24 SMB_A0 IN This signal is bit 0 (LSB) of the 3-bit address of the SMBus EEPROM on the CNR board. Refer to Section 6.1.1.2 for detailed information on the connectivity of this signal. The state of this signal during reset must be the SMBus address of the CNR board.
A25 SMB_SDA IN/OUT Bi-directional serial data line between the SMBus master to SMBus slave device(s) on the CNR board. For detailed information on this signal, refer to the current version of the System Management Bus Specification. The reset state of this signal must meet the current version of the System Management Bus Specification.
B25 SMB_SCL IN Serial clock line from the SMBus master to SMBus slave device(s) on the CNR board. For detailed information on this signal, refer to the current version of the System Management Bus Specification. The reset state of this signal must meet the current version of the System Management Bus Specification.
A26 AC97_RESET# IN Active low AC TM97 link reset signal. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B26 CDC_DN_ENAB# IN/OUT CDC_DN_ENAB# indicates whether the motherboard or the CNR is in control, or mastering, the AC TM97 interface attached to the CNR Connector. When at a logic low level, the CDC_DN_ENAB# signal indicates that the primary codec on the motherboard is active and controlling the AC TM97 Interface. In addition, the CNR will, when CDC_DN_ENAB# is low, demote its codecs to the next available address and to the next available SDATA_IN signal. See Section 3.3.1 for more details on the implementation of the CDC_DN_ENAB# signal. When at a logic high level, the CDC_DN_ENAB# signal indicates that a primary codec on the CNR is taking control of the AC TM97 Interface. In addition, the motherboard will, when CDC_DN_ENAB# is high, disable all of its codecs. See Section 3.3.1 for more details of how to implement the CDC_DN_ENAB# signal.
A27 RESERVED - RESERVED
B27 GND - Power supply and signal ground return path.
A28 AC97_SDATA_IN1 OUT AC TM97 serial data from an AC TM97-compliant codec (primary or secondary) to an AC TM97-compliant Controller. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B28 AC97_SYNC IN Synchronization pulse from an AC TM97-compliant controller to all of the AC TM97- compliant codecs on the AC link. This signal is nominally a 1.3 µS wide pulse, which is used to synchronize the AC link. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
A29 AC97_SDATA_IN0 OUT AC TM97 serial data from a primary AC TM97-compliant codec to an AC TM97-compliant Controller. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
B29 AC97_SDATA_OUT IN AC TM97 serial data from an AC TM97-compliant controller to all of the AC TM97- compliant codecs on the link. For detailed information, refer to the current version of the AC TM97 Component Specification. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
A30 GND - Power supply and signal ground return path.
B30 AC97_BITCLK IN/OUT Serial data clock from primary codec to AC TM97 Controller and any non-primary codecs. The nominal frequency of this signal is 12.288 MHz. For detailed information, refer to the current version of the AC TM97 Component Specification. AC97_BITCLK is an output from a primary codec and an input to non-primary codecs. The reset state of this signal must meet the requirements of the current version of the AC TM97 Component Specification.
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